BRONZE PROPELLER STOPPER 13191Q01

Function and technical context

The bronze propeller stop is an essential component of the transmission system that acts as a thrust washer, lodging between the propeller hub and the propeller shaft. Its main function is to distribute the axial loads generated during acceleration and navigation, preventing the propeller from moving longitudinally on the axis. This component works in the propulsion system of outboard and inboard engines, supporting constant bending and compression forces. If the prop stop is worn or damaged, the propeller can become misaligned, causing excessive vibration, propulsion inefficiency, and even water entering the gearbox.

When to replace this part?

Propeller stop wear is manifested by abnormal vibrations in the propeller shaft, visible misalignment of the propeller or longitudinal movement of the hub with respect to the shaft. Although there is no fixed maintenance interval, it is advisable to check the condition of the stop during each propeller change or seasonal maintenance, especially after frequent reversing maneuvers or impacts against submerged objects. Preventative replacement of the propeller stop, even without obvious symptoms, prevents emergency repairs at sea and prolongs the life of the drive system.

Engine Compatibility

Compatible Mercury Mariner Engines

Equivalent manufacturer part numbers